Dynamic mechanical properties of natural fiber composites-a review

Natural fiber composites have become a new tradition as an alternative to conventional materials. To meet this new tradition material testing, newer techniques have been set up that are termed as dynamic mechanical analysis (DMA), which is an adaptable methodology that accompanies the more traditional techniques. Through these techniques, it is summarized that interconnected bonds between reinforced natural fibers within different matrix materials will affect the dynamic variables like storage modulus (E), loss modulus (E ''), and damping factor (tan delta), and also, it was stated that these are temperature dependent. The dynamic variables were unfavorably affected by the improvement in the length of fibers and fiber loading, but geometric changes (developments) were not considered. Frequent uncertainties in the dynamic loading in any structure are because of noises, shocks, winds, tides in the ocean and some of the live and imbalanced loads, etc. Much importance was given to vibration damping parameters for structural applications in order to have an improvement in the effectiveness, performance, and freeness in some of the building constraints. In this review, the employability of different natural fibers in forming composites with different matrix materials and the impact of fiber length, chemical treatment, and compositions on the dynamic mechanical characteristics were discussed in detail.